5g per km-tonne adds up to a lot though doesn't it. "Maritime transport emits around 940 million tonnes of CO2 annually and is responsible for about 2.5% of gl

5g per km-tonne adds up to a lot though doesn't it. "Maritime transport emits around 940 million tonnes of CO2 annually and is responsible for about 2.5% of global greenhouse gas (GHG) emissions (3rd IMO GHG study)." https://ec.europa.eu/clima/policies/transport/shipping_en https://ec.europa.eu/clima/policies/transport/shipping_en The problem is that we (as a species) are moving far too much, far too far.